202 SOILS AND PLANT LIFE 



QUESTIONS 



. 1. Name four uses of corn. 



2. What changes do we find in the corn plant as we go from 

 south to north through the United States ? 



3. Name the two factors which commonly limit the yield of 

 com throughout the Corn Belt. 



4. Name seven indications of unsoundness or immaturity 

 in an ear of com. 



5. Name five important points considered in examining the 

 ear of seed com. Three in examining the kernels. 



6. Name four methods of selecting the seed supply for the 

 following year's crop. 



7. State the advantages of the one first given in the text. 



8. In what ways may moisture cause the death of the germs 

 of an ear of seed com? 



9. Name the conditions necessary in storing seed corn. 



10. Tell how to make a germination test with a "rag doU." 



11. Describe the ideal seed bed for corn. 



12. Name the steps necessary in preparing such a seed bed 

 in sod ground. 



13. What are the advantages of fall plowing of sod ground? 



14. State two reasons why the burning of stalks should be 

 avoided. 



15. What is the particular advantage of checking corn? 



16. What is the great advantage of Usting corn ? 



17. Why do com growers regard the replanting of missing 

 hills with disfavor? 



18. How could you tell how deep it is safe to cultivate a field 

 of com? 



19. Name two injurious results of allowing a crust to form on 

 the surface of the ground while the com is growing. 



20. Name three reasons why the sorghums can succeed in drier 

 weather than can corn. 



